Locking mount



y 1945. K. E. SCHONERT ET AL 2,376,280

LOCKING MOUNT Filed July 21, 1943 2 Sheets-Sheet l ATTORNEYS y 1945. K. E. scHo ERT ETAL 2,376,280

' LOCKING MOUNT Filed Jul 21, 1943 2 sheets-sheet 2 H te EINVENTORSZ aes r C/Zone!" BY Willard Cl'laifield ATTORNEYS vices applied to an ATR mount. l

Patented May15,1945

i Koester E. schonert and Willard o. Hatfield,

Stamford. 001111., assignors to Airadio Incorporated, Stamford, Conn, a corporation of Con- "Application July 21, 1943, Serial No. 495,618 r l SClaims. (c1.151--41) Our invention relates to a new and improved locking-mount.

one of the objects of our invention isto provide a locking-mount for radio accessories, electronic accessories, and other devices, especially for use with vehicular equipment, in order to protect such devicesfrom shock and vibration, and to hold the chassisof such devices securely in position.

Another object of our invention is to provide simple and eificient locking-means for locking the chassisof such devices inposition. Another object of our invention is to provide an improved locking devicewhich is automatically held in lockedposition, and whichcanbe easily unlocked.

Other objects of our invention are stated in the annexed description and drawings,which illustrate a preferred embodiment thereof. Our invention is illustrated in said embodiment, as applied to the well-known ATR mount, which i has been extensively used for mountingradio accessories and electronic accessories on vehicular equipment. i i

Fig. 1 is a front end elevation of a part of the improved device. Fig. 2 is a section on the line 2-2 of Fig. 1. Fig. 3 is a perspective view of the angle member which is one of the elements ofthe improved device. i I

Fig. 4 is an elevationof the nut which is one* of the elements of the improved device.

through resilient washers 0 and through the top walls of v rigid supporting cups II. These cups ll rest upon any suitable supporting base. The resilientwashers l0 overlap the edge of the bores in theiiat top walls of the respective cups H.

The head ll of eachbolt 8 abuts the respective rigid washer l4, which abuts the bottom of the bottom washer I 0.

'I'he resilient washers I 0, which can be made of rubber or the like, have central resilient bosses, as shown in Figs. 2 and 5.

At the rear of the casing or chassis 2, the re spective flanges 3 are provided with respective fixed housings. Each housing 42 has perforated front and rear walls, in which a plunger is slidably mounted. Each plunger 40 fits snugly and slidably in the bores of said Walls of its housing 42. Eachplunger 40 has a front tapered end,

.which enters a respective bore in the rear vertical wall of chassis 2. Each plunger 40 is biased forwardly by acompressi-on spring 43, whose front end abuts a respective plate 4|, which is fixed to the respective plunger 40;

. Eachplate 4| acts as a stop for the respective Fi 5 is a verticallongituclinal section, partially in elevation, which shows the improved The instrumentsor devices I are mounted in a housing or chassis 2. i Y

, Said chassis 2 is slidably supported on the horizontal flanges 3 of angular rails, which have vertical flanges 4. These horizontal flanges 3 constitute slide-supports for the chassis 2. Said chassis 2fits snugly and slidably between the vertical flanges 4. For convenience, it is assumed that saidsupporting. flanges 3 are horizontal and that the flanges 4 are vertical, although the device is operative in any position.

The bottom faces of said flanges 3 abut the top face of a frame or plate 5.

As shown in Figs. 2 and 5, the bottom planar face of said frame 6 abuts the planar top faces of the top walls of rigid channel members 1. which have a U-shaped cross-section. Bolts 8. whose upper flared ends are counter-sunk in flanges 3, pass through respective vertically alined bores which are provided in said flanges 3 and plunger 40, when the chassis 2 is oifthe rails. In

such case, each stop plate abuts the rear face of the front wall of the respective housing 42.

Each plunger 40 is longitudinally alined with anangular clampingarm I 9, which is fixed to the front wall I! of the chassis 2, in a vertical position. Each said clamping arm l9 has a plurality of vertically elongated holes l8. The height of each hole [8 exceeds its width. The holes iii of each clamping arm [9 are alined with respective holesfin said front Wall. The shanks of clamping screws 20 pass through the respective pairs of alined holes of each clamping arm I 9 and of front wall 11. Each clamping screw 20 is provided with a lock washer 2| and a clamping The heads of clamping screws 20 are wider than holes 18. Hence each clamping arm l9 can be clamped in adjusted vertical position relative 33a. which is later described. The foot 19a is of uniform length and width, and it has a flat endwall lBb, whose upper edge is convex and whose lower edge is concave.

At its lower end, as shown in Figs. 2 and 3, an

said frame '6, through rigid washers 9 and I4, angular through-and-through slot 23 is provided Each said-spring 24 mesheswith said nut either forwardly-or rearwards.

of chassis 2.

in each angular arm l9. Said angular slot 23 extends into the foot lBa of said arm l9.

Said slot 23 is closed at each end thereof. The upper end of a bent spring 24 is fixed to each arm l9, at the upper end of slot 23. The lower end of spring 24 is unattached to foot l9a, so that said lower end can move backand forth in the respective partofslot 23'. I

As shown in Fig. 2, each angular arm 19 is associated with a pivoted locking arm 26, whose shank has an external thread. Each locking arm 26 has a rear head 21, which is pivotally connected by pivot pin 28 to an angular plate 30',

a web of which is fixed byas'crew 32 to a-depend- 1 ing lug of frame 6. A nut locking device 33,, whose rear-annular face is provided with teeth or serrations 34, has a tapped bore, by means of which-said nut 33 is I turnably mounted on the threaded shank of the respective locking arm 26, \-As shown inFig. 2, eachrsaid nut 33 .has an in- ;ternal. frusto-coni cal wall- 33a at its-rear. end.

:.The front orinner end of said .frustoaconical wan 33a is of smaller: diameter or width thani'tsrear outer end. When each nut. 33 is in theposition ,shownin Fig. 2, for example, said frusto-conical Wall 3311 interfits with-thetop frustoeconica'l wall of foot [9a, as previously stated tWhenwall 33a so-interfitswith said topiwall of l'9a,:n'ut 33- ca'n befreely turned.- Nut 33 can be turned. sojas to move it rearwardly on itswlocking armilmuntil the planar transverse internal -wall. 3311,01 nut 33 abuts the end-wall 19b of footil9a. Ifnut 33 -is.now further turned as to move it rearwardly,

it exerts a rearward pressure uponthe respective arm l9, thus forcing the .chassis 2'rearwardly.

1 Hence thepressure of the.lockingnuts- 33- is taken up wholly by thearms l9, andno pressure is imposed upon the springs. 24. e

the tapered teeth 34, when walls 33b and [9b abuteach other. The springs24 andrthe, teeth can intermesh, before said walls 331) and IBD-abut. a v v Each spring 24 then acts as a yieldabledetent, to hold the respective; nut 33 against turning nless sufficient force is exerted on said nut. When spring 24 thus intermeshes with. teeth 34', l the free lower end ofspring 24 moves, longitudinally backand forth whennut 33 is turned .to, move When the nut 33'clears foot 19a, the. locking arm 26 of said-nut,.with the nut assembled ron such -arm -26, can beturned downwardly to'the inoperative position shown in brokenlines in Fig.

5, in -order to clear-the front ends of .the'rails Thechassis 2 can then be slid on o ofi. the rails. When the locking arms 26 are in-said inoperative positions, the chassis 2 can he slid rearwardly on therails-untilthe tapered ends of the plungers 4U partially enter the bores in the rear wall .The locking arms 26 are then turned toopera- -tive positions, and then nuts 33 are turned to move said nuts rearwardly. I a I i As soon as-walls 33b and 19b abut each other,

* the chassis 2.

;When the nuts 33 are in final locking position,

the chassis 2 is held against longitudinal movement and upward movement, relative to the .1 -rails'." '-Ihe springs 24 hold the nuts 33 in such fi'nalio'cking position.

We have described a preferred embodiment of .our;-.-invention,-but it is clearv that numerous changes and omissions and additions can be casing, said attachedbar having a forwardly and downwardly projecting foot which extends in front of said slide support, alocking bar pivotally connected at -its rear. end to; said slide support, said lockingbar being externally, threadedianut turnably mounted on said threaded-locking bar, said locking barbeing turnabletoa position..in '-which said nut clears the front end .of-saidfoot, the rear end-part of said nut having aminternal frusto-conical wall whose-front innerend is of smaller diameter thanits rear outerv end, said nut being movable on said lockingbar to aposition in which said frusto-conical wall abuts a transverse wall, of said foot, yieldabledetent meansfixed to said attached bar and associated with said nut and adapted to hold the'nutin abutment with said transverse Wall of said-foot, said nut exerting a rearward thrust directly against said attached bar when saidnutis moved rearwardly on said locking bar.

2'. A nut locking device which comprises a'bar, said bar having a bodyand 'a foot which is inclined downwardly and forwardly relative to=said body, said foot having a longitudinal slot which extends into said {body so that said :slot is of-lon- -gitudina1 angular shape, a;'spring,-a.part ofnsaid spring being fixed to said body, apart of said spring being located in saidslot of said foot and being freely movable -back-and forth insaidi slot of said foot, a part of said spring 'extendingforwardly of said body for engagement with ratchet teeth on anut. i I

3. A device according tocIaim 2, in which said foot has an outer wall shaped substantially like a. portion of a frusto-conical wall, whose-nar- -row endis located adjacent the tip of said foot.

, KQESTER E: scnouERr, ,WILLARD o. HATFIELD; 

